[ARC5] Fw: Model 19 MKll

[Henry Mei'l's]

I guess I meant B set (not A set)!

----- Original Message ----- 
From: "Henry Mei'l's" <meils at get2net.dk>
To: "Discussion of AN/ARC-5 military radio equipment." 
<arc5 at mailman.qth.net>
Sent: Monday, February 22, 2010 9:03 PM
Subject: Re: [ARC5] Model 19 MKll


> Re WS19/MkII:
> I also key the 807 cathode via the relay - I'm going to adjust the relay 
> contact spacing so that the oscillator goes on a bit before 807 cathode 
> contacts close.
> I still get a slight chirp but will put some VRs on the osc. & 807 sg's --  
> if necessary, I  might "step" load the 807 plate supply so that when in 
> transmit mode, current drain will be nearly constant on key up / key down 
> .
> The A set space could be used for built in PS, a Q-multiplier or even en 
> extra PA stage - but that would defeat the QRP quality of the set.
> Henry OZ1UF, Cph
>
> ----- Original Message ----- 
> From: "Donald Sanders" <w4bws at yahoo.com>
> To: "ARC5" <arc5 at mailman.qth.net>
> Sent: Monday, February 22, 2010 2:51 AM
> Subject: [ARC5] Model 19 MKll
>
>
> Back in 1956 while in High School our radio club advisor, who taught 
> mathmatics and Radio theory class, got a model 19 for the club. I took the 
> task to get it on the air. We had no manuals just the unit and power 
> supply. I quickly found out about the key voltage and traced the wiring to 
> find out why. Then promptly installed a keying relay with low coil voltage 
> to the key. I traced most of the wiring just to find out how it worked. 
> That was practice for many other "reverse Engineering" jobs later.
> I was very happy to make contacts with that old girl, almost QRP but lots 
> of fun. Yes, I got an A in the radio class.
> Don W4BWS
>
>
> Meyer Gottesman wrote:
> I own a Wireless Set 19, Mark II. The "B" set is a rather useless SUPER 
> regen or "rushbox" as some hams call it. I find it utterly useless. The 
> "A" set can be made into a very nice 80 and 40 CW rig. The 807 grid 
> modulation makes AM less than useless but again, a nice CW rig. The screen 
> grid voltage on the key is very dangerous and should be rewired to 807 
> cathode keying. The original keying is a non-starter and a real shocker, 
> literally. Hi Hi!
>
> 73,
>
> Meyer Gottesman, W6GIV
> Macon, GA
>
>
>
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